Grinding-tool for gas-engine valves.



G. L. BAIJIWII;- GEINDING TOOL POR GAS ENGINE VALVES. APELIGATIQN FILED JULYso, 19134.

L-g Patented 51115128, 1914.

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l En?? rma/vifs To all whom it may concern:

CHESTER L. BALDWIN, OF

ALMOND, WISCONSIN, ASSIGNOR O1? ONE- HALF TO MERLE CASEY, OF ALMOND, WISCONSIN.

GRINDING-TOOL FOR GAS-ENGINE VALVES.

Specification of Letters Patent.

Patented July 58,

Application filed July 30, 1913. Serial No. 781,963.

VBe it known that I, CHESTER L. BALDWIN, a citizen `of the United States', and a resident of Almond, in the county. of Portage and State of Wisconsin, have invented a new and Improved Grinding-Tool for Gas-'Engine Valves, of which the following is a full,

clear, and exact description.

This invention relates to a tool for enabling gas engine valves to be ground on their seats.

The invention has for its general objects to improve and simplify the construction and operation of, tools of this character so as to be comparatively inexpensive to manufacture, reliable and eliicient in use and readily adjustable for various sizes and Jforms of valves.

Another object of the invention is the provision of a hand tool having` a valve-engaging'head connected with a stem or shaft to which rotation is imparted by one hand of theoperator through suitable means, while pressure is exerted through the tool on the valve by the other hand so as to hold the valve in grinding relation to its seat.

Another object of the invention is the provision of adjustableand removable engaging means on the head of the tool and also steadying devices on the head which are adjustable to engage with the valve.

l Another object is the provision of a spirally threaded shaft or stem with which engages a threaded sleeve that is reciprocated on the stem so as to rotate the latter alternately in opposite directions to effect the grinding action.

`With these objects in view, and others as will`r appear as the description' proceeds, the invention comprises irious novel features of construction and arrangement of parts which will be more fully described hereinvafter and `set forthwith particularitv in the.

claims appended hereto. x

AIn the accompanying drawing, which illustrates one embodiment of the invention,"`

and wherein similar reference characters are yemployed to designate corresponding parts throughout the several views, Figure l is a side view of the tool with the upper handle .in section; Fig. 2 is a sectional view ontheline 2-2 of Fig. 1; Fig. 3 is a bot tom plan view of the head of the tool: and Fig..4,is a sectional view on the line 4-4 of Fig. l; Fig. 5 is aside view of a modified which are disposed in form of tool, Fig. 6 is a central vertical section thereoi; Fig. 7 1s a bottom plan View; and Fig. 8 is a section slmilar to Fig. 6,

showing a different stylell of valve-engaging.

means applied to the head of the tool.l

Referring to the drawing, A designates the head of the tool which is a dislolike bodv havingrin its under side guideways 1 and 2 a diametrical line with a partition Sbetween them, the walls of the guideways being undercut to provide shoulders 4. In the guideways are bits 5 and 6 which slide inwardly and outwardly by the turning of a rotary element 7 which y has rightand left hand threads 8 and 9 that engage in threaded openings 10 and l11 in the bits 5 and 6, respectively. The middle portion 12 of the threaded element 7 is smooth and reduced to provide shoulders 13, and this reduced portion 12 is journaled in an opening 14 in the partition 3.` Thus bv turning the threaded element 7 the bits 5 and 6 can be moved 'inwardly or outwardly so that the valve-engaging portions 15 of the bits will be in proper` relation to engage in sockets or the like in the top of the valve to be ground.

The head A is adapted to be rotated bv a shaft or stem B which is connected with the head by a universal joint C, which-oint C consists of a block or connecting'element 16 which is set between lugs 17 onthe head A and united therewith by journals or pins 18 fastened to the block 16, and spanning the block are the bifurcations 19 of the stem B, there being a in 20 passing through the block 16 and ifurcations 19 to hingedlv connect the block-with the stem. The pin 20 is disposed at right-angles to the iournals 18, so that universal movement is provided between'the head A and stein B. The stein B has a spiral groove or thread 21 of coarse pitch, and slidable longitudinally of the stem is a sleeve 22 that has a pin 23 that projects into the groove 21, so that as the sleeve 22 moves up and down on the stem B the latter is rotated in one direction and then in the other, there being on the sleeve 22 a handle 24 whereby the operator can conveniently actuate the sleeve. On the upper end of the stem B is a rest or handle 25 that has a central metallined opening 26 through which the upper end of the stem passes, said upper end being reduced to form a shoulder 27 that is engaged'by the handle A opposite direction.

To steady the head A with respect to the valve the head is provided with screws or equivalent devices 29 which are threaded in openings 30 in the head, the upper ends 31 ofthe screws being knurled so that they l can'be easily turned.

. and steadying I ject downwardly inserted in the cap openinr in 3f."

-tend out of the valve chamber where the vvide 'for the adjusting screw Inapplyin the tool to a valve the bits thereof are adjusted so as to engage in the depressions, slots or other means '32 provided in the top surface of the valve, and

then the screws 29 are turned in such adirection that both of them will bear on the upper surface of the'` valve'. With this arrangement the tool has a four-pointglcontact with the valve, namely, thetwo bits 5 and 6 screws 29. The head of the proportioned, that it can be readily the valve of course extool is so chamber, and the stem B handles. 20 and 25 can be conveniently grasped. -l

The head A is in elneml -aspects the same as the head1 A in 'gs 1 and 2, with thev exception that the transverse partition or bearing 3 is dispensed with and a single diametrical slot 1*? extends entirely across the bottom of the head, the side walls of the slot being undercut. At the center of fthe slot is a recess or seat 35 which serves asin Fig.- 6 to hold the bit 36 centrally in place, or, as shown in Fig.` 8, to hold a removable bearing 37 for the right and left-hand screwv 38 which moves the its 5 and 6*. inwardly and outwardly. The bit 36 hasan enga ng edge 39 similar to a screw' driver an is adapted to engage in a slot in the valve to be ground. When a centrally-disposed bit' is employed, as shown in Figs. 5 to 7 inelusive, foursteadying screws 40 'are pu)-` vided in the head A', and thesescrews are so adjusted Vthat their llower ends will lie in` the same plane and bear on the valve to be ground, but theadjustment ofthe screws is such' hat' the edge 39 of the bit 36 will probelow the plane in which thelower ends of the screwslie, so as to enable the bit 36 to be engaged" in the slot of the valve while thev screws rest. on the surface of the latter. `When the bits are to 4 be employed, as'shown in liig. 8, the screws 40 extending throughthe ends of the slot or guideway la are removed so as to proappertains,

3d for the bitsV 5a and 6a. I.In the bit 36 is a chamber 41 that contains a spring 42, which springl presses upwardly a key 43 in the form of a ball, sol that it will enter the` recess 35, whereby 'lateral displacement of the bit 36 1n the guideway l is prevented. The conversion of the tool from a single to a double bit valve-engaging means is very simply ac-y complished and yet the tool is reliable in operation when used in either manner.

From the foregoing description taken in vconnection with the accompanying drawthe advantages of the construction and ings,

method of operation and of the device` shown will be readily understood by those skilled in the art to which the invention and while I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illusy trative and that such changes may be when desired as are within the scope of the appended claims.

'Havingthus described my invention, I

made

claim as new and desire to secure by Letters v Patent: y

1. A valve grinding tool comprising a head, valve-engaging meansv thereon, independently adjustable devices on the head engaging said means to steady the head with respect to the latter, and means connected with the head for turning the same. l

2. A tool of the class described comprising a. head, 'adjustable valve-engaging bits thereon, adjustable devices on the head for engaging the valve to steady the head with respect thereto, and means connected with the head for turnin the same.'

3, A tool of t e class described comprising a head, a pair of adjustable bits thereon, l pair .gf steadyin devices'adjustably mount- 'ed oh the head coperati'ng with the. bits to forma Ifourlpoint contact between the 'head and'valve,

and means connected ing the same. v 4.' A tool of the class described o'xnprising, a head, a pair of-bits on the head and ad'ustable inv a diametrical line toward and om the center of rotation, a paix' of screws arranged in a diametrical hneat right-angles with the head for turnto the line of the bits and adaptedto engage the valve for steadying the head `'with'rethe valve and separate from theor engagingsthe valve and.

spectthereto, and means connected with the head for turning the same.

5, A tool of-the'class described comprising a head, steadyingdevices mounted Ongthb head .at opposite ,sides olllhe cenftfherf for engagement with the valve, valvecngaging means placed t y )ppositefisides of th'e center of thehead. thereon, a shaft having a screw thread, a universal connectionk y between the shaft and head, a handle e. A vai-v nain head,

swiveed on the uppe "end of the shag-ft, and

, 1 u seeye slidable'on the shaft and engaging the threadthereof to impart rotation to the shaft. -f

E -thereon, and a plurality of devices adjustgggly. mounted on the head for engaging the @ll-Vetto steady thetoo with respecttheret'o.'

tool comprising a' remove le va veengag1ng means' n testimony whereof Iy have signed my 10 name to this specification i1; the presence of two subscribing witnesses.

.CHESTER L. BALDWEN. Witnesses ERNEST E. INGLE, ETHELYJ. INGLE. 

